The move could give Amazon an even stronger foothold in the $750 billion grocery market, which it dramatically shook up when it purchased Whole Foods Market for $13.7 billion.

An Amazon spokesperson said the company doesn't "comment on rumors or speculation.''

Amazon Go's first location opened in Amazon's Seattle headquarters in 2016 and become open to the public in January of this year. Shoppers use their Amazon Go app to enter, and then instead of dealing with a cashier, cameras and sensors note what they buy. Their accounts are automatically charged for whatever products they carry out.

The company currently has three Amazon Go locations in Seattle and one in Chicago.

But now, the Bloomberg report says the expansion may be more extensive, with roughly 50 of those stores potentially welcoming customers next year, and hundreds more open for business by 2021.

The original Seattle location offered a hodgepodge of cold drinks, sweets and lunch foods that could be quickly grabbed and taken out. The selection also included dinner meal kits, frozen foods and even a small selection of wines and beers.

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Amazon's new grocery store allows its members to literally grab and go.
USA TODAY

Depending on which store they visit, shoppers can find prepared meals for any time of the day, or grocery items including cheese, chocolates and bread.

That food mix is more akin to what shoppers might find in convenience store chains like 7-Eleven. Still, the news of Amazon's potential plans seemed to briefly sour investors on larger grocery retailers like Kroger, which has the second largest share of the grocery market after Walmart and saw a slight dip in its stock price before trading ended for the day.

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A new retail hub exclusively for U.S. small businesses.
Time

Kroger shares rebounded after hours, with the share price up less than 1 percent to $28.90.